Caster for furniture.



.A. B. DISS.

CASTER FOR FURNITURE. APPLICATION FILED DEC. 31. I914.

THE COLUMBIA PLANOGRAPII 60.. WASHINGTON, D. C

Patented Apr. 25, 1916.

@TAT fl I; PATENT OFFTWE.

ALBERT B. DISS, OF NEWARK, NEW JERSEY, ASSIGNOR TO UNIVERSAL CASTER- &.FOUNDRY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

CAS'IER FOE FURNITURE.

specification of Letters Patent.

Patented. Apr. 25, 1916.

To all whom it may concern:

Be it known that I, ALBERT. B. DIss, a cit1- zen and resident of Newark,New Jersey, manufacturer, (whose post-office address is care ofUniversal Caster & Foundry Company, at Newark, New Jersey,) haveinvented certain new and useful Improvements in Casters for Furniture,of which the following is a description.

The principal object of the invention is to produce an improvedconstruction of caster, comprising friction reducing roller bearings. Itis equally applicable to many different forms of casters but isdescribed and shown herein in the more specific embodiment fordetachable casters having a pintle with an enlarged head cooperatingwith a socket.

The invention combines the economy of material and labor and thereforemanufacturing cheapness with excellence in opera tion. It also affordsprotection for the friction reducing members, keeping out dust and dirtand preventing interference from foreign bodies.

Figure 1, is an outside view of portions of a caster embodying thepresent invention. Fig, 2 is a plan view of the same, partly brokenaway, to show the interior of the construction. Fig. 3 shows a sectionalong the lines 33 of Fig. 2.

By the term caster unless the context shows a more specific meaning, Ishall refer in general to the whole caster structure includingstationary and movable parts; and I have illustrated a form in whichparts, such as the socket plate for instance, though free to turn doesnot do so because the friction re ducing members allow the jaws to turnrelatively with greater freedom, for the one has rolling and theothersliding bearing surfaces.

In the drawings 5 is the caster wheel, 6 the jaws thereof, 7 the pintlesecurely fastened to the jaws in an appropriate manner, and 8 the socketadapted to cooperate with the pintle and its enlarged head portion insecuring the caster in a now well known manner. The sliding surface 9and the serrated periphery 10 of the socket plate are of course designedfor their respective well known purposes.

The leg supporting plate 11 is the upper tracker plate for the bearingin the form of the invention shown. The upper side 12 of the caster jawsor horn 7 forms the lower tracker plate for the bearing.

The plate 11 is provided with an annular corrugation 13 forming abearing for the rollers 14. These rollers roll between the bearing 13and a corresponding bearing surface on the lower tracker 12. Concentricwith the bearing 13 is the corrugation 16 which with a similarcorrugation in the lower tracker 12 gives greater clearance for theheaded portions 15 of the rollers. Corrugations 13 and 16 thus compriseannular clownwardly projecting bearing surfaces, separated by an annulargroove, the construction of the lower tracker being similar. The roller14 and its headed portion 15 are of one piece construction. It is to benoted that the headed portions 15 of the rollers, and the inner portionsof reduced diameter have rolling contact with surfaces 16 and 13,shaped. to fit the same, and that the diameters of the two portions ofthe rollers are so chosen, with relation to the lengths of the circularpaths traveled by each, that the rollers will have no tendency to getout of their radial. positions, which would otherwise be caused by thefact that the inner portions of the rollers travel in a smaller circlethan the outer, or headed portions, 15.

It will, of course, be understood that in referring to the trackerplates, I do not mean to imply that the tracker surfaces must be in onepiece with the jaws and leg supporting plate, neither is it necessarythat the weight of the leg should rest upon the plate 11 at all. Wellknown constructions permit the carrying of the weight upon the head ofthe plgilitle if desired, though this is objectiona e.

In the present invention, the upper tracker plate 11 has a downturnedflange which houses and protects the otherwise exposed ends of therollers 14 and prevents endwise movement of the rollers radially fromthe pintle.

The rollers 14 are located and spaced peripherally by the spacer plate17. The latter has cut-out portions conforming in shape to the rollersas is shown in Fig. 3.

Without limiting myself other than is implied by law, I claim asfollows:

1. In a caster structure, the combination of a caster-wheel, jawstherefor having atracker surface upon the horizontal connecttraveled bysaid portions, that the rollers will have no tendency radial positions.7

.2. In a caster structure, the combination of a caster wheel, jaws,radially arranged rollers of cylindrical shape, having outer to turn outof their portions of greater diameter than the inner portions,an'upperfroller bearing plate, a

Copies of this patent may "be obtained for iivecents each, by addressingthe lower roller bearing plate, and a spacer for the rollers beneath thesaid upper bearing plate, the said roller bearing plates each having apair of annular corrugations separated by a groove, said corrugationsconstituting annular bearing surfaces for the inner and outer portionsof the rollers, the two diameters of each roller being so chosen, withrelation to the lengths of the paths traveled by said two portions, thatthe rollers will have no tendency to turn out of their radial positions,said upper roller bearing plate having means for holding the rollersagainst outward radial displacement.

In testimony whereof I have signed this specification in the presence oftwo subscrib- ALBERT B. DISS. Witnesses E. P. LA GAY, JOHN HERB.

.ing witnesses.

Commissioner or Patents,

Washington, D. 0;"

